This device is a light weight, portable and user friendly. Through specific wave length of infra ray to cure the nasal passage. It only takes 10 minutes of therapy usage. It is a quick and simple healing process and there's no pain or side effects. Instruction: One: Connect the probe to the device Two: Cleanse the probe using anti-septic liquids before use Three: the probes nostrils to the depth of comfort. Four: After , switch on the device and therapy starts. Each therapy lasts about 30 minutes and two to three times a day. Suitable for: Allergic rhinitis, acute rhinitis, chronic rhinitis, sinusitis, hypertrophy rhinitis, and so on.